CEILING DIFFUSER - technalco · A = Diffuser Neck size N = Nominal size = Duct size ‘D’ F =...
Transcript of CEILING DIFFUSER - technalco · A = Diffuser Neck size N = Nominal size = Duct size ‘D’ F =...
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CHAPTER-4CEILING DIFFUSERS INDEXo Supply,Return, Diffusers
o Combination Models of Supply and Return Air
o Standard Directional Core Patterns
o Engineering and Performance Data
o Notes on Selector
o Smoke diffusion Pattern Pictures
o Test Results from ETL
o Effective Free Area
o Selection Tables
o Easy Selection Graphs
o Ceiling Diffusers Fixing Details
o Ordering Data
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Square and rectangular models:
TECNALCO directional diffusers are a popular, versatile choice for many heating, ventilating and cooling applications. There is a style, size, pattern to fit every conceivable installation and shape and size of space to be conditioned. The diffuser directional pattern can be selected to deliver the appropriate amount of conditioned air in to the areas, where it is needed.
TECNALCO ceiling diffusers can supply large volumes of conditioned air at acceptable sound levels and pressure drops, when over all dimensions of the diffuser are limited by modular ceiling systems or architectural considerations.The excellent performance is completed by a pleasing appearance that hormonizes with various architectural details, especially in modular ceiling systems.
Features:
Rear dampers and ancillaries are of aluminium mill finish. Available with black matt finish in colour onrequest.
Face is of extruded aluminium natural anodised or bronze anodised colour. Available on request in any colour, powder coated in satin, glossy or matt finish.
Available with optional extended panels to suit modular ceilings.
Available in square and rectangluar shapes, with different directions of discharging core styles for 1, 2, 3 and 4 way in horizontal path
Internal core is of spiral spring loaded, easily removable type, to provide easy access and for adjustment of key operated opposed blade damper.
Material is of extruded aluminium in natural anodised finish.
Available with Flanged border (standard type) or Recessed border (Type ‘C’).
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Standard Type. Designed for flush surface mountingon all types of ceilings, custom made in a variety ofcore patterns.
This type of construction is of standard model ofTECNALCO with flanged border.
Available in a variety of flange styles to suit variousceiling applications.
Available with optional extended panels to suitmodular ceilings.
Wide selection of sizes and core patterns.
Directional core easily removable at diffuser face.
Fecilitates replacement of core pattern afterinstallation, should a revision be required.
Standard sizes:Neck and overall dimensions of square-type models
L x W mm mm mmx x y m x n
150 x 150 145 x 145
220 x 220
295 x 295
370 x 370
445 x 445
520 x 520
595 x 595
452 x 452
293 x 293
368 x 368
443 x 443
518 x 518
593 x 593
668 x 668
743 x 743
600 x 600
225 x 225
300 x 300
375 x 375
450 x 450
525 x 525
600 x 600
457 x 457 *
N = D = Duct sizeN = Nominal size
A = Neck size of the diffuserB = Face side (outer to outer size)
N = Listed size = L x WA = (L - 5) x (w - 5) = x x yB = (x + 148) x (y + 148) = m x n
F = (m - 60) x (n - 60)= (L + 83) x (W + 83)
= (L + 143) x (W + 143)
= Diffuser overall sizeF = False ceiling opening size See Table No.
*A special model for suiting in a ceiling module size of 600 x 600 mm
NOTE:Possible error in dimensions = 1%
Standard sizes:Any combination of L x W
150 150
225 225
300 300
375 375
450 450
525 525600 600
L Wmm mm
CDR
CDS
CDF
TECNALCO model CDR is used as a return air dif-fuser.
TECNALCO model CDS is accompanied by a keyoperated opposed blade damper, which is nor-mally used for supply air. The opposed bladedamper can be operated with a screw driver afterremoving internal core. Refer to Page No. 4-12for diagramatic representation.
TECNALCO model CDR is a fresh air inlet diffuser.
CDS
Excellent for Variable Air Volume Applications:The uniform, nearly horizontal jet from the outer core, maintains effective distribution even whenthe air volumes vary over a considerable range.
CDF
= Blade pitch = 38 mm
= Flange depth = 48 mm
= Damper depth = 36 mm
= Damper pitch = 25 mm
= Filter thickness= 12.5/25 mm
B p
F d
F t
Dd
Dp
150 x 150
225 x 225
300 x 300
375 x 375
450 x 450
525 x 525
600 x 600
457 x 457
233 x 233
308 x 308
383 x 383
458 x 458
533 x 533
608 x 608
683 x 683
540 x 540*
N FL x W mm mm
False ceiling opening sizes:
Frame thickness = 1.2mm
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Standard sizes:Neck and overall dimensions of square-type models
Standard sizes:Any combination of L x W
Designed for installation in modular metal pan ceil-ings with snap-in T-bar suspension. Sized to fit the standard dimensions of the metal panel modules.
Recessed type:
It maintains same features as TECNALCO stan-dard type models, except in border flange.
Recessed type border enables diffuser face to bemounted flush with ceiling tile modules withoutover- lapping flange.
CDR-C
150 150
225 225
300 300
375 375
450 450
525 525600 600
L Wmm mm
N A BL x W mm mm mmx x y m x n
150 x 150 150 x 150
225 x 225
300 x 300
375 x 375
450 x 450
525 x 525600 x 600
520 x 520
230 x 230
305 x 305
380 x 380
455 x 455
530 x 530
605 x 605680 x 680
600 x 600
225 x 225
300 x 300
375 x 375450 x 450
525 x 525600 x 600
520 x 520
*A special model sized to fit in a ceiling module size of 600 x 600 mm
NOTE:Please add 5mm to ‘N’ for duct opening size.
A = Diffuser Neck size
A = Diffuser neck size = x x y
h = Diffuser height =
N = Nominal size = L x W
N = Nominal size = L x W
D = Duct size = (L + 5) x (W + 5)
Frame depth = 35 mm
(L + 80) x (W + 80)B = Diffuser overall size =
B = Diffuser overall size = m x n
F = False opening size = (m - 14)
Fd
Fd
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CDS
TECNALCO model CDS is accompanied by a keyoperated opposed blade damper, which is nor-mally used for supply air. The opposed bladedamper can be operated with a screw driver afterremoving internal core. Refer to Page No. 4-12for diagramatic representation.
CDS
Excellent for Variable Air Volume Applications:The uniform, nearly horizontal jet from the outer core, maintains effective distribution even whenthe air volumes vary over a considerable range.
= Blade pitch = 38 mm
= Flange depth = 48 mm
= Damper depth = 36 mm
= Damper pitch = 25 mm
= Filter thickness= 12.5/25 mm
B p
F d
F t
Dd
Dp
150 x 150
225 x 225
300 x 300
375 x 375
450 x 450
525 x 525
600 x 600
457 x 457
233 x 233
308 x 308
383 x 383
458 x 458
533 x 533
608 x 608
683 x 683
540 x 540*
N FL x W mm mm
False ceiling opening sizes:
SUPPLY, RETURN, EXTRACT CEILING DIFFUSERS
CDR-C
CDS-C
CDR-C-BD
TECNALCO model CDR-C is a return air diffuserwith a recessed frame.
TECNALCO model CDS-C is accompanied by akey operated opposed blade damper. The dampercan be operated with a screw driver afterremoving the internal core, which is used as a supplyair terminal.
TECNALCO model CDR-C-BD is like CDS-C butwith a butterfly damper, used as a supply airterminal.
False ceiling opening sizes:
150 x 150
225 x 225
300 x 300
375 x 375
450 x 450
525 x 525
600 x 600
520 x 520
216 x 216
291 x 291
366 x 366
441 x 441
516 x 516
591 x 591
666 x 666
586 x 586*
N Fmm mm
Extended panel with snap in flanges:
NOTE:For Engineering and Performance Data refer to Page No. 4-14 to 4-31For Fastening details refer to Page No. 4-32
If the ceiling module is more than 75 mm larger than the listed duct size (or) nominal size in either or both dimensions, a module sized extended panel will be added to the diffuser. The extended panel will be of steel (or) aluminium construction, complete with the snap-in flanges, in powder coated colour finish, matching with the Diffuser.
CEILING DIFFUSERS COMBINATION MODELS OF SUPPLY AND RETURN AIR
CDRS-DD
TECNALCO model CDRS-DD type diffuser is a combination of supply and return ceiling diffusers which is sized to match rooftop air conditioners in the most popular capacities.
Standard sizes:Any combination of L x W
150 150
225 225300 300
375 375
450 450525 525600 600
675 675
750 750825 825900 900
L W
Standard sizes:Neck and overall dimensions of Type CDRS - Square models
L x W mm mm mmx x y m x n
150 x 150 145 x 145
220 x 220
295 x 295370 x 370
445 x 445
520 x 520
595 x 595670 x 670
745 x 745
820 x 820
895 x 895
293 x 293
368 x 368
443 x 443
518 x 518
593 x 593668 x 668
743 x 743818 x 818
893 x 893
968 x 968
1043 x 1043
225 x 225
300 x 300375 x 375
450 x 450
525 x 525
600 x 600675 x 575
750 x 750
825 x 825900 x 900
A = Diffuser Neck sizeN = Nominal size = Duct size ‘D’
F = False ceiling opening size
B = Diffuser overall size n = Neck size for the return airegg crate core
CDRS-D
The Return Core Is Decorative Design Pattern Type.
The core is of easily removable type and interchangeable also.
The supply portion of diffuser is accompanied bya key operated opposed blade damper.
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A diffuser with ‘EQUALISINGGRID’ Equalises flow of air into neck of diffuser or duct. Also gives directional control of air flow with minimum noise and turbulance. Equalising grid louvres are individally adjustable, secured in nylon bushes to hold their settings and provide rattle-free perfomance. Extruded aluminium vanes and mill finish frame. Avaliable in black matt finish also
Equalising grid helps for distributing the cool air even more horizontally over the ceiling surface
The vanes of equalising grid can be adjusted to different degrees either in one direction or in both directions away from each other.
B = Vertical bar pitch = 19 mmpv
h = Height of the equalising grid= 40 mm
Standard sizes:Any combination of L x W
150 150
225 225
300 300
375 375
450 450
525 525600 600
L W
Other than the listed sizes arealso available on request.
CEILING DIFFUSERS COMBINATION MODELS OF SUPPLY AND RETURN AIR
The return air core is egg-cratetype with dimensions of 12.5 x12.5 x 0.5 mm aluminium corewith a 90% free area.
The core is of easily removabletype and interchangeable also.
The supply portion of diffuseris accompanied by a key oper-ated opposed blade damper.
False ceiling opening sizes:Return air neck size:
150 x 150
225 x 225
300 x 300
375 x 375450 x 450
525 x 525
600 x 600
457 x 457
233 x 233
308 x 308383 x 383
458 x 458533 x 533
608 x 608683 x 683
540 x 540*
N F
NOTE:
* A special model for suiting in a ceiling module size of 600 x 600 mm
‘n’ - the neck size for the return air - egg cratecore size can be varied as per the customer’srequirement.
150 x 150 75 x 75
225 x 225 150 x 150
300 x 300 150 x 150
375 x 375 150 x 150450 x 450 225 x 225
525 x 525 225 x 225
600 x 600 300 x 300
457 x 457 225 x 225*
N mm mmn
CDR-EC
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Opposed blade damper - OD:
Aluminium filter - AF:
Efficiency of filter:
Particles Size Efficiency %
75 - 150150 - 700 90
60
A Round Damper (or) Butterfly Damper - BD:
Equalising grid - EG:
An opposed blade damper is specially designed for use with all models of TECNALCO square and rectangular type ceiling diffusers. Blade arrangement ensures uniform distribution through diffuser throat. Provides positive control of air volume from full open to full closed position, regardless of system pressure.
Attaches quickly with sheet metal screws directly to neck of the diffuser. Operating lever is accessible at diffuser face or screw operating is accessible at the face of the opposed blade damper, which can be operated by a key or a screw driver.The material is of extruded aluminium mill finish. Black matt in colour is also available on request.
A filter media is specially designed for u e electronic, computer, and pharmace utical industry. The thickness of the filter varies from 50 mm to 100 mm as per requirement.
Adapts square neck CDS diffusers to a round neck, permitting attachment of round flexible or rigid duct. Damper selection is then restricted to dampers for round neck only. Adaptors fit over the diffuser neck for fast assembly
Equalises flow of air into neck of diffuser or duct. Also gives directional control of air flow with minimum noise and turbulance. Louvres are individually adjustable, secured in nylon bushes to hold their settings and provide rattlefree performance. Extruded aluminium vanes and mill finish frame. Available in black matt finish also
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Duct fixing and Core
Removal:
Procedure is reversed for removal of core.
Operation of OpposedBlade Damper:
GENERAL NOTES:
The directional segments of each core style are noted as shown to identify with the tabulated performance data.
Dimensions noted on each core style are the “increments” in mm of the available duct sizes (L x W).
For nonstandard core style, or a standard core style with modified air volume requirements, see the detailed selection procedure and by simple inter and extra polation of the given data, required data will be obtained.
An opposed blade damper is specially designed for use with TECNALCO ceiling diffusers of all models. Blade arrangement ensures unform distribution through diffuser throat. Provides positive control air volume from full open to full closed position, regardless of system pressure. The full open to full closed position of damper to any degree can be operated by a screw driver after removing the internal core, which is shown in the figure.
Insertion of diffuser core is effected by depressing core pin springs in holes located at end of border frame and releasing core when pins are aligned with corresponding holes at opposite end offrame.
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Standard directional core patterns of Ceiling Diffusers
R ‘2’ Way ‘W’ R ‘3’ Way R ‘4’ Way
S ‘1’ Way S ‘2’ Way
S ‘C’ Way S ‘3’ Way S ‘4’ Way
R ‘1’ Way ‘W’ R ‘2’ Way ‘L’R ‘1’ Way ‘L’
TECNALCO models of Square and Rectangular diffusing cores are interchangeable between standard outer frames of the same size
ENGINEERING AND PERFORMANCE DATA
Throw data are based on terminal velocities (Vt) atthe ceiling for supply air temperatures of 11oCbelow room temperatures. To determine throw forisothermal and t 11oC temperature differential,use factors in following table.
Maximum throw show is based on a Vt of 0.25m/s, and minimum throw on a Vt of 0.75 m/s. Withdiffusers mounted on a 2.7 m high ceiling and sup-plying air at 11o C below room temperature, theapproximate average room velocities will be 0.175m/s and 0.33 m/s respectively.
Vt m/s Isothermal air flow toC = 11oC air flow0.75 1.00 1.000.50 1.05 1.100.25 1.11 1.22
Notes on Selection
Air diffusion without side wall effect with model CDS-4 Wayv t 0
t x
t x
Drop
Vx (m/s)
Vx (m/s)
T = ThrowT = Throw
Spread Spread22 o
22o
oC*tR
When two diffusers are discharging air towards each other, selection should be based on the diffuser size which will produce the required throw (one half the distance between diffuser centres) within the medium to maximum throw range at the air volume requirements.
When diffusers are mounted on an exposed duct, or used with drop collars, the throw is decreased by approximately 40%. Air will be discharged downwards at an angle of approximately 20o from the horizontal. Horizontal air thrown can be obtained by extending a surface minimum of 300 mm beyond the periphery of the diffuser.
For heating application, maximum mounting height is 3.7 metres at 16.5o C temperature differential with returns mounted at or near floor level.
NC data are measured at a location from the diffuser of 1.5 metres and 45o angle from the face with an allowance of 10 dB for room effect and for diffusers without dampers or with dampers fully open. A blank space indicates no significant sound.
Note: Sound Power level ratings are available for the full range of diffusers upon request and are based on recommendations as per ADC Standard 1062 - GRD 84
Dampers fitted to diffusers are intended for fine balancing purposes. Excessive dampering to overcome high duct pressures will result in an increased sound level of approximately 8dB per doubling of pressure drop
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ENGINEERING AND PERFORMANCE DATA
Air Distribution
For ceiling diffusers, in addition to air flow, air throw and induction characteristics are the principle actors for selection.
Calculate the total air flow for the specific area.locate diffusers uniformly and co-ordinate with lighting fixtures.If diffusers cannot be located in the center of the area, select random diffusers with 1, 2 or 3 way pattern.Suggest diffuser locations considering ceiling height.Find maximum air flow rate per side of diffuser.Control the total air flow rate permissible per diffuser.Select the number of supply and return diffusers.Control sound level for the type of application.Select the size of diffusers from the air flow data and recontrol the horizontal throw of the selected diffusers.
The induction factor and the throw can be adjusted by the individual internal setting blades for slotdiffusers but they are mostly fixed for ceiling diffusers.
For such reason, the selection of ceiling diffuser must be made with precision, taking into consideration,the following procedure:
At important neck velocity, the ceiling diffusers can have high induction factors which are included in the throw values in the information given on following pages.The importance of air induction can be observed from pictures taken with contrast smoke.
Air Induction
Air induction
Air
flow
m3 /h
.
150500
1,000225
1,500
2,000
2,400375
450
0.5 1.0 1.5 2.0 2.5
300
Induced air ratio to m3 supply air.
Tests have been made on CD-4 listed sizes 150 mm, 300 mm and 600 mm with different neck velocities.The resulting air induction factor becomes important with increasing neck velocity and the induced air capacity can be more important in volume than the initial air supply.
Air induction is an important factor in air conditioning distributing systems.The energy produced by the volume flow through diffuser and the discharge velocity at the diffusers outlet induces the air in the room and is the principle reason for the drop in temperature between supply air and room air.At high neck velocity, the induced air capacity can become more important than the original air flow, and throw is increasing in function of induced air ratio.Testing results for throw includes the influence of air induction.
ENGINEERING AND PERFORMANCE DATA
Ceiling effect
How to Specify
1. Sizes are designated by neck dimensions (L xW).2. Available core patterns are illustrated on page 4-133. Standard sizes are available in increments of 75 mm, dependiing on the dimensions involved and the core pattern selected.4. The module size is required when extended panel models are specified.
Performance Notes
All pressures are in mm of water.TP = total pressure.- SP = negative static pressure.Throw data is listed in Metres to terminal velocities (Vt) as listed below.Minimum throw to Vt = 0.75 met/sec.Middle throw to Vt = 0.5 met/sec.maximum throw to Vt = 0.25 met/sec.
Sound data:NC values are based on a room absorption of 10 db, re 10-12 watts. Tested per ADC EquipmentCode 1062 : GRD-84Performance data as tabulated is for supply air applications.Performance data assumes that CDS is mounted on the ceiling for maximum ceiling effect.When no ceiling effect is present, the horizontal throw will be reduced approximately by 25%, producing a downward projection angle as illustrated in the above Figure.
Ceiling
300 mm150
75750 mm
750 mm
16o
30o
Model CD directional diffusers are not recommended for applications without ceilings, such as exposed duct mounting. Performance data as published in this catalogue is based on the CD diffuser being mounted at the ceiling. The published performance for the directional air pattern benefits from the ceiling coanda effect. When the CD diffuser is mounted remote from the ceiling, the air patterns to be anticipated are illustrated in Figure.
With model CDS-4 Way 225 x 225 mm size
Diffusing of air pattern without ceiling effect
t0 = 11o C differential
High Efficiency Units
TECNALCO Model CDF
2.
1.
Designed specifically to filter critical air supplies in operating theatres, sterile and contaminated suites, also in viral and toxic research areas. B.S. 3928 class 99.9995% efficiency with Hepa filters.
A filter media for use in submicroscopic clean areas especially in the electronic, nuclear and pharmaceutical industries.
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ENGINEERING AND PERFORMANCE DATA
NOTE :
Tests have been conducted with constant volume of air (smoke)
Smoke tests conducted by ETL Testing Laboratories Inc. An ADC certified lab.
Model: CDS-4 150 x 150 mmDischarging of air pattern with ceiling effect
Model: CDS-4 300 x 300 mmDischarging of air pattern with ceiling effect
Model: CDS-4 600 x 600 mmDischarging of air pattern with ceiling effect
Model: CDS-4 600 x 600 mmDischarging of air pattern with ceiling effect
Discharging of air pattern can be observed from the smoke test results.
ENGINEERING AND PERFORMANCE DATA
Test Results from ETL
Test method :
Air volume qv :
Neck velocity Vk :
Throw T :
NC values :
Outlet size :
Air volumes are given in Lt/sec.
The throw values given in the tables are related to the ceiling diffuser placed nearer tothe ceiling.Three throw values are given for each qv to the corresponding terminal velocities Vt.
VtVtVt
Minimum Throw 0.75 m/sec.Middle Throw 0.50 m/sec.Maximum Throw 0.25 m/sec.
The effective neck velocities given are related to the corresponding neck areas of the diffuser.
Outlet sizes are mentioned on the left side of each row within a tolerance of 10%
The tests were conducted, by the ETL Testing Laboratories, on the selected sizes of the supply ceiling diffusers. The diffusers had adjustable opposed blade dampers attached to their inlets. The dampers were set to full open position. The test results include Total pressure, Area factor, Throw pattern and Sound power level.
The diffusers were tested in accordance with Air Diffusion Council Test Code for Grilles, Registers and Diffusers ADC 1062: GRD-84. The diffusers were installed in the ADC facility and supplied with measured volumes of air. The static pressure was measured 1-1/2 duct diameters upstream of the diffuser inlet.
If the ceiling diffuser is mounted on an exposed duct, these throw values should beidecreased by a factor 0.6 0.75 .
Noise data is given in terms of NC levels. These have been derived from sound power level data (dB re 10-12 watts) by subtracting 10 dB (Room effect) from the sound power levels.
Area Factor AkFor air outlets and inlets
MANUFACTURER: TECNALCO OUTLET/INLET TYPE & SIZE: 150 mm square
PRODUCT: 4WAY CEILING DIFFUSER
FLOW METER EQUIPMENT: 305 mm metering station152 mm sharp edged orifice
NECK AREA: 225 cm2
ANEMOMETER: Alnor Velometer Type 6070PTYPE & SERIAL NUMBER: 6077AA
READINGS CALCULATIONS
RUNNO. Meter P
Flow
Pa
DISCHARGE VELOCITY IN m/sec.
1 2 3 4 AVE.
STATICPRESSURE
Pa
FLOW
L/s
NECKVEL.m/s
NECKV.P.Pa
TOTALPRESS.
Pa
AREA FACTOR( Ak )
1 9.71 6.48 6.60 6.86 6.60 6.63 22.90 47 2.03 2.49 25.39 0.0071
2 14.93 7.98 8.13 8.26 8.26 8.15 35.84 59 2.54 3.98 39.82 0.0072
3 21.41 9.86 10.16 10.26 10.26 10.13 51.27 71 3.05 5.72 56.99 0.0070
AVERAGE 0.0071
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ENGINEERING AND PERFORMANCE DATA
Throw Test Data
Product: 4Way Ceiling Diffuser - 150 mm square
Run No. A Flow L/s 71 NC 30
Run No. B Flow L/s 47 NC 19
Distance from Outlet, Throw in Metres
cm
2.5
7.5
15
22
30
45
60
90
120
* *
0.6
0.3
0.3
Drop 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
2.2 1.5 1.1 0.7 0.6 0.5 0.3 0.25
1.0 1.1 0.9 0.7 0.5 0.4 0.3 0.25
0.25 0.3 0.4 0.3 0.25 0.25 0.25
Velocity in m/s.
Distance from Outlet, Throw in Metres
cm
2.5
7.5
15
22
30
45
60
90
120
*
Drop 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Velocity in m/s.
2.5 1.5 1.1 0.7 0.5 0.4 0.3 0.25
0.4 0.6 0.8 0.6 0.5 0.3 0.3 0.25
ENGINEERING AND PERFORMANCE DATA
Sound Test Data
Sound Power Level Data Sheet
Octava BandCenter Frequency
Hertz
150 x 150 mm Four Way
Discharge Sound Power Level LwdB re 10-12 Watt
1252505001000200040008000
Total Air Volume L/s
Inlet Total Pressure, Pa
**Noise Criteria
36.036.5*27.018.0(16.0)(19.5)(26.5)
36.537.035.0*28.024.0(19.5)(26.5)
38.541.040.0*35.032.524.0
(26.5)
43.045.044.540.039.0*31.527.0
46.048.048.545.545.5*39.531.0
35
14.44
12
47
25.39
19
59
39.82
24
71
57.00
30
85
82.14
36
NOTE:
Sound power level data marked in parenthesis has reached ambient levels in the test room. Actuallevels are less than or equal to the levels indicated.
*Octave Band Center Frequency, Sound Power Level that determined the Noise Criteria for each air volume.
**Noise Criteria ratings were determined by subtracting 10 db (room effect) from the Sound Power Levels.
Technical Data:
Ceiling height Max. Cooling t Maximum air flow for onedirection
m /s3 m /h3(m)
2.53.03.54.0
(oC)
11141617
0.100.220.350.50
36080012601800
Recommended maximum air flow per direction in relation to the height differential between the supply airand room air.
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ENGINEERING AND PERFORMANCE DATA
Ceiling Diffusers - Effective Free Area Ak = met2
Nom
inal
Size
L x
W (m
m)
Cor
e St
yle
S 1
S
2
S 2
C
S 3
S
4
R 1
W
R 2
W
R 1
L
R
2L
R
3
R
4
150
x 15
00.
0073
0.00
73
0.
0073
0.00
71
0
.007
0.01
55
0.
0155
0.01
55
0.
0152
0.01
5
0.02
97
0.
0297
0.02
97
0.
0293
0.0
29
0.04
28
0.
0428
0.04
28
0.
0425
0.0
42
0.06
19
0.
0619
0.06
19
0.
0619
0.0
61
0.08
82
0.
0882
0.08
82
0.
088
0.08
7
0.10
95
0.
1095
0.10
95
0
.109
0.
108
0.01
0.0
1
0
.009
5
0.0
095
0.
009
0.0
09
0.01
4
0.0
14
0
.013
0.0
13
0.
013
0.0
12
0.01
8
0.0
18
0
.017
0.0
17
0
.017
0.0
165
0.02
2
0.0
22
0
.021
0.0
21
0
.021
0.0
2
0.02
2
0.0
22
0
.019
0.0
19
0.
017
0.0
16
0.02
7
0.0
27
0
.023
0.0
23
0.
022
0.0
21
0.03
5
0.0
35
0
.031
0.0
31
0
.031
0.0
30
0.03
7
0.0
37
0
.035
0.0
35
0.
034
0.0
33
0.03
8
0.0
38
0
.037
0.0
37
0.
0365
0.0
36
0.04
6
0.0
46
0
.045
0.0
45
0.
0445
0.0
44
0.05
5
0.0
55
0
.052
0.0
52
0.
051
0.0
5
0.05
7
0.0
57
0
.056
0.0
56
0.
055
0.0
52
0.06
6
0.0
66
0
.065
0.0
65
0.
0645
0.0
64
0.08
3
0.0
83
0
.082
0.0
82
0.
081
0.0
8
0.09
5
0.0
95
0
.094
5
0.0
945
0.
093
0.0
93
225
x 15
0
300
x 15
0
375
x 15
0
450
x 15
0
225
x 22
5
300
x 22
5
375
x 22
5
450
x 22
5
525
x 22
5
300
x 30
0
375
x 30
0
450
x 30
0
525
x 30
0
375
x 37
5
450
x 37
5
525
x 37
5
450
x 45
0
525
x 45
0
600
x 45
0
525
x 52
5
600
x 60
0
231.
5-2.
0-3.
934
2.1-
3.1-
4.6
683.
6-5.
1-7.
579
4.1-
5.1-
7.9
563.
6-4.
3-6.
445
2.9-
3.8-
5.4
512.
9-3.
8-5.
876
3.4-
4.8-
6.1
101
4.3-
5.6-
7.0
127
4.9-
6-6.
915
25.
7-6.
5-8.
817
75.
7-6.
4-9.
3
903.
5-5-
6.4
135
5.2-
6.3-
7.9
180
6.1-
7.4-
9.5
225
6.5-
7.8-
10.8
270
6.9-
7.8-
11.6
315
7.3-
8.8-
12.6
141
4.3-
6-8.
121
16-
7.5-
9.6
281
7.2-
8-11
352
7.9-
9.1-
12.8
422
8.2-
9.8-
13.7
492
8.8-
10.2
-15.
2
203
5.1-
6.9-
9.1
304
7.1-
8.9-
11.8
405
8.2-
9.4-
13.1
506
8.8-
10.6
-14.
960
79.
7-11
.4-1
6.1
908
10.2
-12.
9-18
276
5.9-
8-12
.055
19.
6-11
.7-1
6.8
689
11-1
3.1-
17.9
827
11.9
-14-
19.5
965
13-1
5.5-
20.5
413
8.2-
10-1
4.5
360
7.3-
10.2
-13.
854
010
.2-1
1.9-
1672
011
.2-1
4.5-
1890
012
.8-1
5-20
.110
8013
.8-1
6.4-
21.5
1260
14.6
-11.
1-24
.0
Nec
k Si
zeVe
loci
tyPr
essu
re(P
a)
Neck
Vel
ocity
M/S
1.0
1.5
2.
0
2
.5
3.0
3.
5
0.5
1.3
2.
4
3
.7
5.4
7.4
(mm
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
150
x 15
0
225
x 22
5
300
x 30
0
375
x 37
5
450
x 45
0
600
x 60
0
525
x 52
5
NC
<
15
< 15
1
8
23
29
3
5
NC
<
15
< 15
1
8
24
29
3
4
NC
<
15
< 15
2
4
31
36
4
1
NC
<
15
23
31
3
7
4
3
47
NC
1
7
2
8
3
5
42
47
5
2
NC
1
9
3
4
3
7
44
49
5
4
NC
2
2
3
3
4
0
46
51
5
6
ENG
INEE
RIN
G A
ND
PERF
ORM
AN
CE
DATA
Sele
ctio
n Ta
bles
of C
eilin
g Di
ffuse
rs -
Squa
re C
ore
- 1
Way
Disc
harg
e
TECNALCOCEILING DIFFUSERS
21 22
TECNALCOCEILING DIFFUSERS
ENGINEERING AND PERFORMANCE DATA
Selection Tables of Ceiling Diffusers - Square Core - 3 Way Discharge
Nec
k Si
zeN
eck
Velo
city
Velo
city
Pres
sure
(Pa)
M/S
1.0
1.5
2.0
2
.5
3.0
3.5
0.5
1.3
2.4
3.
7
5.
4
7.4
(mm
)
150
x 15
0
225
x 22
5
300
x 30
0
375
x 37
5
450
x 45
0
525
x 52
5
600
x 60
0
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
NC
<
15
< 15
18
23
29
35
NC
<
15
< 15
18
24
29
34
NC
1
5
1
5
24
31
3
6
41
NC
1
5
2
3
34
37
4
3
47
NC
1
7
2
8
35
42
4
7
52
NC
1
9
3
1
37
44
4
9
54
NC
2
2
3
3
40
46
5
1
56
341.
9-2.
1-3.
02.
0-2.
6-3.
4
451.
8-2.
4-4.
02.
1-3.
0-4.
2
562.
1-3.
0-4.
32.
4-3.
6-4.
8
682.
4-3.
0-4.
62.
9-3.
8-5.
0
792.
7-3.
7-4.
93.
1-3.
8-5.
1
321.
0-1.
5-2.
51.
2-1.
6-3.
0
512.
4-3.
0-4.
32.
7-3.
0-4.
8
902.
7-4.
0-5.
82.
7-4.
3-6.
2
141
3.6-
5.4-
7.0
3.6-
5.4-
7.6
203
4.3-
5.8-
8.2
4.6-
6.4-
8.5
276
4.6-
6.7-
9.8
4.9-
7.4-
10.4
413
6.7-
8.5-
11.9
7.4-
8.9-
12.5
551
7.9-
9.8-
14.0
8.8-
10.7
-14.
6
689
9.1-
11.0
-15.
59.
5-11
.7-1
6.1
827
9.8-
11.9
-17.
110
.4-1
2.4-
18.0
965
10.7
-13.
1-18
.311
.3-1
3.8-
19.2
360
5.5-
7.9-
11.3
5.8-
8.5-
11.9
540
7.9-
9.8-
13.7
8.6-
10.2
-14.
4
720
9.1-
11.3
-15.
89.
4-11
.9-1
6.4
900
10.4
-12.
8-18
.010
.7-1
3.3-
18.9
1080
11.3
-13.
7-18
.811
.9-1
4.3-
19.7
1260
12.2
-14.
6-21
.012
.8-1
5.2-
21.9
304
5.8-
7.3-
10.4
6.4-
7.9-
11.2
405
7.0-
8.5-
11.9
7.8-
8.9-
12.6
506
7.6-
9.4-
13.4
8.4-
11.0
-15.
2
607
8.2-
10.4
-14.
68.
6-11
.0-1
5.2
908
8.8-
11.0
-15.
89.
4-11
.8-1
6.7
211
4.9-
6.1-
8.5
5.6-
6.9-
9.3
281
5.6-
7.0-
9.8
6.5-
7.8-
10.7
352
6.4-
7.9-
11.3
7.3-
8.6-
11.9
422
7.0-
8.5-
12.2
7.8-
9.2-
12.9
492
7.6-
9.1-
13.7
8.1-
9.7-
14.0
135
4.3-
5.1-
7.0
4.6-
5.1-
7.3
180
4.9-
6.1-
8.2
5.5-
6.7-
8.8
225
5.2-
6.4-
9.4
5.9-
7.1-
10.0
270
5.8-
7.0-
10.0
6.4-
7.4-
11.0
315
6.1-
7.6-
11.0
6.8-
8.0-
11.8
762.
9-3.
7-5.
22.
9-4.
3-6.
0
101
3.4-
4.3-
6.0
3.7-
4.9-
6.3
127
3.8-
4.5-
6.7
4.1-
5.2-
7.3
152
4.4-
5.2-
7.6
5.0-
5.8-
8.2
177
4.6-
5.5-
8.0
5.0-
5.8-
8.6
TECNALCOCEILING DIFFUSERS
23 24
TECNALCOCEILING DIFFUSERSEN
GIN
EERI
NG
AN
D PE
RFO
RMA
NC
E DA
TA
Sele
ctio
n Ta
bles
of C
eilin
g Di
ffuse
rs -
Squa
re C
ore
- 2
Way
Disc
harg
e
Nec
k Si
zeVe
loci
tyPr
essu
re(P
a)
Neck
Vel
ocity
M/S
1.0
1.5
2.
0
2
.5
3.0
3.
5
0.5
1.3
2.
4
3
.7
5.4
7.4
(mm
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
150
x 15
0
225
x 22
5
300
x 30
0
375
x 37
5
450
x 45
0
600
x 60
0
525
x 52
5
NC
<
15
< 15
1
8
23
29
3
5
NC
<
15
< 15
1
8
24
29
3
4
NC
1
5
1
5
2
4
31
36
4
1
NC
1
5
2
3
3
1
37
43
4
7
NC
1
7
2
8
3
5
42
47
5
2
NC
1
9
3
1
3
7
44
49
5
4
NC
2
2
3
3
4
0
46
51
5
6
231.
2-1.
6-3.
1
512.
7-3.
3-5.
2
903.
2-4.
6-6.
0
141
4.0-
5.6-
7.8
203
4.8-
6.6-
8.6
276
5.2-
7.4-
10.6
360
6.1-
8.6-
12.1
540
8.8-
10.4
-14.
672
010
.0-1
1.9-
16.6
900
11.0
-13.
7-18
.910
8011
.9-1
4.6-
19.7
1260
12.9
-15.
5-22
.6
413
7.6-
9.1-
13.0
551
8.8-
10.6
-15.
068
910
.0-1
1.9-
16.6
827
10.6
-12.
8-18
.196
511
.6-1
4.0-
19.4
304
6.8-
8.2-
11.3
405
7.9-
9.1-
12.8
506
8.5-
10.2
-14.
560
79.
1-10
.9-1
5.7
908
9.7-
12.2
-16.
9
211
5.8-
7.2-
9.2
281
6.9-
7.8-
10.7
352
7.6-
8.8-
12.4
422
7.9-
9.4-
13.4
492
8.5-
9.9-
14.8
135
4.9-
5.9-
7.6
180
5.8-
7.0-
9.1
225
6.2-
7.3-
10.3
270
6.7-
7.6-
11.2
315
7.0-
8.5-
12.2
763.
2-4.
5-5.
810
14.
0-5.
2-6.
612
74.
6-5.
7-6-
515
25.
4-6.
4-8.
417
75.
5-6.
0-9.
0
342.
0-2.
8-3.
645
2.3-
3.2-
4.5
562.
8-3.
9-5.
068
3.2-
4.1-
5.2
793.
5-4.
1-5.
8
Nec
k Si
zeVe
loci
tyPr
essu
re(P
a)
Neck
Vel
ocity
M/S
1.0
1.5
2
2.
5
3
.0
3.5
0.5
1.3
2.4
3.
7
5
.4
7.4
(mm
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
225
x 15
0
300
x 15
0
450
x 15
0
300
x 22
5
450
x 22
5
525
x 30
0
450
x 30
0
NC
15
15
19
22
27
32
NC
15
15
23
28
29
33
NC
17
19
27
34
39
44
NC
18
20
28
35
40
44
NC
20
23
32
37
42
48
NC
24
26
33
39
45
50
NC
25
27
35
42
46
52
321.
4-2.
1-5
432.
2-3-
5.9
652.
5-3.
8-6
652.
5-3.
8-6
101
3-3.
9-6.
5
128
3.5-
4.4-
7.2
152
3.9-
5.2-
7.3
472.
1-4-
5.5
642.
9-4.
8-6.
4
983.
3-5.
1-7
983.
3-5.
1-7
152
3.9-
5.2-
7.5
198
4.4-
5.8-
9
231
4.7-
6-9.
2
664-
5.1-
6.2
904.
1-5.
5-7
130
4.5-
5.8-
8
130
4.5-
5.8-
8
180
4.8-
6.3-
8.5
264
5-6.
9-9.
2
312
5.4-
7.1-
9.9
854.
1-4.
9-7
112
4.4-
5.4-
8
164
5-6.
5-8.
6
164
5-6.
5-8.
5
252
5.5-
6.9-
9.4
334
6.6-
7.3-
10.2
396
6.9-
7.4-
10.8
945-
5.8-
7.6
132
4.8-
5.5-
8.3
198
5.5-
6.8-
8.9
198
5.5-
6.8-
8.9
302
5.8-
6.9-
10
404
6.9-
7.9-
11
484
7.2-
8.1-
11.6
112
5.2-
6.1-
8.2
152
5.1-
6.5-
9
231
5.9-
7.1-
9.3
231
5.9-
7.1-
9.3
360
6.3-
7.9-
11
472
6.9-
8.3-
12
571
7.5-
8.7-
13
ENG
INEE
RIN
G A
ND
PERF
ORM
AN
CE
DATA
Sele
ctio
n Ta
bles
of C
eilin
g Di
ffuse
rs -
Rect
angu
lar C
ore
- 1 W
ay D
ischa
rge
ENGINEERING AND PERFORMANCE DATA
Selection Tables of Ceiling Diffusers - Square Core - 4 Way Discharge
NC
< 1
5
< 1
5
1
8
23
29
35
NC
< 1
5
< 1
5
1
8
24
29
34
NC
< 1
5
< 1
5
2
4
31
36
41
NC
< 1
5
2
3
3
1
37
43
47
NC
< 1
5
2
8
3
5
42
47
52
NC
1
9
3
1
3
7
44
49
54
NC
2
2
3
3
4
0
46
51
56
Nec
k Si
zeVe
loci
tyPr
essu
re(P
a)
Neck
Vel
ocity
M/S
1.0
1.5
2.
0
2
.5
3.0
3.
5
0.5
1.3
2.4
3
.7
5.4
7.
4(m
m)
L/S
Thro
w (m
)Pt
(Pa)
L/S
Thro
w (m
)Pt
(Pa)
L/S
Thro
w (m
)Pt
(Pa)
L/S
Thro
w (m
)Pt
(Pa)
L/S
Thro
w (m
)Pt
(Pa)
L/S
Thro
w (m
)Pt
(Pa)
L/S
Thro
w (m
)Pt
(Pa)
150
x 15
0
225
x 22
5
300
x 30
0
375
x 37
5
450
x 45
0
525
x 52
5
600
x 60
0
231.
0-1.
5-2.
56
341.
9-2.
1-3.
013
451.
8-2.
4-4.
023 10
13.
4-4.
3-6.
023 18
04.
9-6.
1-8.
223 28
15.
6-7.
0-9.
823 40
57.
0-8.
5-11
.924
506
7.6-
9.4-
13.4
37
551
7.9-
9.8-
14.0
24 720
9.1-
11.3
-15.
825
900
10.4
-12.
8-18
.039
1080
11.3
-13.
7-18
.856
1260
12.2
-14.
6-21
.076
689
9.1-
11.0
-15.
538
827
9.8-
11.9
-17.
155
965
10.7
-13.
1-18
.375
607
8.2-
10.4
-14.
654
908
8.8-
11.0
-15.
874
352
6.4-
7.9-
11.3
37
422
7.0-
8.5-
12.2
54
492
7.6-
13.7
73
225
5.2-
6.4-
9.4
36
270
5.8-
7.0-
10.0
53
315
6.1-
7.6-
11.0
127
3.8-
4.5-
6.7
36
152
4.4-
5.2-
7.6
53
177
4.6-
5.5-
8.0
72
562.
1-3.
0-4.
336
682.
4-3.
4-4.
653
792.
7-3.
7-4.
972
762.
9-3.
7-5.
213 13
54.
3-5.
0-7.
013 21
14.
9-6.
1-8.
513 30
45.
8-7.
3-10
.413 41
36.
7-8.
5-11
.914 54
07.
9-9.
8-13
.714
512.
4-3.
0-4.
36 90
2.7-
4.0-
5.8
6 141
3.5-
4.9-
7.0
6 203
4.3-
5.8-
8.2
6 276
4.6-
6.7-
9.8
6 360
5.5-
7.9-
11.3
6
TECNALCOCEILING DIFFUSERS
25 26
TECNALCOCEILING DIFFUSERS
Nec
k Si
ze
Nec
k Ve
loci
ty
Velo
city
Pres
sure
(Pa)
M/S
1.0
1.5
2.0
2
.5
3.0
3
.5
0.5
1.3
2.4
3
.7
5.4
7.4
(mm
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
L/S
Thro
w (m
)
225
x 15
0
300
x 15
0
450
x 15
0
375
x 15
0
300
x 22
5
450
x 22
5
375
x 30
0
375
x 52
5
525
x 22
5
NC
15
15
19
2
2
2
7
32
NC
15
15
23
28
29
3
3
NC
< 1
5
< 1
5
2
4
33
38
42
NC
17
19
27
34
3
9
44
NC
18
20
28
35
4
0
44
NC
19
22
30
38
4
1
46
NC
20
23
32
37
4
2
48
NC
22
26
31
40
4
2
49
NC
23
24
31
39
4
2
48
321.
1-1.
8-4.
647
1.8-
3.7-
4.9
663.
4-4.
5-5.
985
3.6-
4.3-
6.8
944.
4-4.
9-7.
211
24.
5-5.
8-7.
9
431.
8-2.
4-5.
464
2.4-
4.3-
5.8
903.
9-4.
9-6.
711
24.
1-4.
9-7.
613
24.
6-5.
2-7.
915
24.
9-6.
1-8.
4
572.
0-2.
9-5.
484
2.9-
4.8-
6.1
112
4.0-
5.2-
7.0
141
4.1-
5.1-
8.0
168
5.1-
5.9-
8.1
198
4.9-
6.6-
8
652.
2-3.
1-5.
798
3.0-
4.9-
6.6
130
4.2-
5.2-
7.7
164
4.8-
6.0-
8.2
198
5.2-
6.1-
8.4
231
5.4-
6.8-
9
652.
2-3.
1-5.
7
832.
4-3.
3-6.
0
101
2.8-
3.6-
6.1
110
2.7-
3.7-
6.4
104
2.8-
3.7-
6.4
152
3.5-
4.9-
7.0
176
3.8-
5.2-
7.4
164
3.8-
5.2-
7.7
180
4.4-
6.0-
8.1
234
4.7-
6.4-
8.4
221
4.7-
6.4-
8.4
252
5.2-
6.4-
9.0
302
5.6-
6.6-
9.6
231
5.9-
6.3-
9.6
302
5.3-
6.5-
9.5
362
5.6-
6.9-
9.9
345
5.6-
6.9-
9.9
360
6.0-
7.4-
10.5
430
6.0-
7.8-
11
404
6.0-
7.5-
10.8
983.
0-4.
9-6.
613
04.
2-5.
2-7.
716
44.
6-6.
0-8.
219
85.
2-6.
0-8.
223
15.
4-8.
8-9
124
3.2-
4.9-
6.7
165
4.4-
6.0-
7.8
208
4.9-
6.0-
8.4
248
5.3-
6.2-
9.3
296
5.7-
7.0-
9.8
ENGINEERING AND PERFORMANCE DATA
Selection Tables of Ceiling Diffusers - Rectangular Core - 2 Way Discharge
ENGINEERING AND PERFORMANCE DATA
SelSelection Tables of Ceiling Diffusers - Rectangular Core - 3 Way Discharge
Nec
k Si
zeN
eck
Velo
city
Velo
city
Pres
sure
(Pa)
M/S
1.0
1
.5
2
.0
2.5
3
.0
3
.5
0.5
1
.3
2
.4
3.7
5.
4
7
.4(m
m)
L/S
Thro
w (m
) Tx
225
x 15
0
300
x 15
0
450
x 15
0
300
x 22
5
450
x 22
5
450
x 30
0
525
x 30
0
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
NC
15
1
5
19
22
27
32
NC
15
1
5
23
28
29
33
NC
17
1
9
27
34
39
44
NC
18
2
0
28
35
40
4
4
NC
25
2
7
35
42
46
52
NC
24
2
6
33
39
45
50
NC
20
2
3
32
37
4
2
4
8
471.
9-2.
1-3.
01.
9-3.
6-4.
4
321.
0-1.
5-2.
51.
0-1.
6-3.
5
431-
1.5-
2.5
1.4-
2.1-
5
651-
1.5-
2.5
2-2.
9-4.
9
652.
4-3-
4.3
2.4-
3.4-
5.4
101
2.4-
3-4.
32.
7-3.
4-5.
5
128
2.7-
4-5.
83-
4-6.
5
152
2.7-
4-5.
83-
4.5-
6.5
231
4.3-
5-7
4.4-
5.4-
8.1
312
4.9-
6.1-
8.2
5-6.
7-9
396
5.2-
6.4-
9.4
6-6.
8-10
484
5.8-
7-10
6.1-
7.2-
11
571
6.1-
7.6-
116.
5-8-
12
198
4.3-
5-7
4.2-
5.1-
8
264
4.9-
6.1-
8.2
4.8-
6.4-
8.5
334
5.2-
6.4-
9.4
5.8-
6.7-
9.7
404
5.8-
7.0-
105.
9-7.
1-10
.5
472
6.1-
7.6-
116.
4-7.
9-11
.4
152
2.9-
3.7-
5.2
3.3-
4.8-
6.8
982.
9-3.
7-5.
23.
1-4.
5-6
130
3.4-
4.3-
63.
6-4.
9-7
164
3.8-
4.5-
6.7
4.4-
5.8-
7
198
4.4-
5.2-
7.6
4.6-
5.7-
8
231
4.6-
5.5-
85.
1-8.
2-8.
9
180
3.4-
4.3-
64.
1-5.
7-7.
7
252
3.8-
4.5-
6.7
4.5-
6-8
302
4.4-
5.2-
7.6
5-6.
1-8.
9
360
4.6-
5.5-
85.
5-6.
9-10
641.
9-2.
1-3
2-3.
9-5.
4
981.
9-2.
1-3
3.7-
4.6-
6
130
1.8-
2.4-
43.
6-4.
8-6.
8
164
2.1-
3-4.
33.
9-5.
9-7.
5
198
2.4-
3.4-
4.6
4.8-
6-8.
1
231
2.7-
3.7-
4.9
5.1-
6.5-
8.8
901.
8-2.
4-4
3.3-
4.3-
6.4
112
2.1-
3-4.
33.
6-4.
5-7.
2
132
2.4-
3.4-
4.6
4.2-
5-7.
5
152
2.7-
3.7-
4.9
4.4-
5.8-
8.2
661.
8-2.
4-4
3.1-
4.1-
5.5
852.
1-3-
4.3
3.3-
4.2-
6.6
942.
4-3.
4-4.
64.
1-4.
6-7
112
2.7-
3.7-
4.9
4.3-
5.4-
7.5
TECNALCOCEILING DIFFUSERS
27 28
TECNALCOCEILING DIFFUSERS
ENGINEERING AND PERFORMANCE DATA
Selection Tables of Ceiling Diffusers - Rectangular Core - 4 Way Discharge
Nec
k Si
zeN
eck
Velo
city
Velo
city
Pres
sure
(Pa)
M/S
1.0
1
.5
2
.0
2.5
3
.0
3
.5
0.5
1
.3
2
.4
3.7
5.
4
7
.4(m
m)
L/S
Thro
w (m
) Tx
225
x 15
0
300
x 15
0
450
x 15
0
300
x 22
5
450
x 22
5
450
x 30
0
525
x 30
0
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
L/S
Thro
w (m
) Tx
Thro
w (m
) Ty
NC
15
1
5
19
22
27
32
NC
15
1
5
23
28
29
33
NC
17
1
9
27
34
39
44
NC
18
2
0
28
35
40
4
4
NC
25
2
7
35
42
46
52
NC
24
2
6
33
39
45
50
NC
20
2
3
32
37
4
2
4
8
471.
9-2.
1-3.
01.
3-3.
4-3.
9
321.
0-1.
5-2.
50.
9-1.
4-3.
2
431-
1.5-
2.5
1.2-
2-4.
9
651-
1.5-
2.5
1.8-
2.7-
4.1
652.
4-3-
4.3
2.4-
3.6-
4.9
101
2.4-
3-4.
32.
6-3.
3-5.
1
128
2.7-
4-5.
82.
9-4-
6.3
152
2.7-
4-5.
82.
9-4.
4-6.
1
231
4.3-
5-7
4.3-
5.2-
7.9
312
4.9-
6.1-
8.2
4.9-
6.4-
8.8
396
5.2-
6.4-
9.4
5.6-
6.6-
9.9
484
5.8-
7-10
5.9-
7.1-
10.6
571
6.1-
7.6-
116.
4-7.
9-11
.5
198
4.3-
5-7
4.3-
5.1-
7.8
264
4.9-
6.1-
8.2
4.9-
6.3-
8.4
334
5.2-
6.4-
9.4
5.7-
6.6-
9.6
404
5.8-
7.0-
105.
8-7.
1-10
.4
472
6.1-
7.6-
116.
2-7.
8-11
.3
152
2.9-
3.7-
5.2
3.2-
4.5-
6.3
982.
9-3.
7-5.
23.
2-4.
1-5.
9
130
3.4-
4.3-
63.
7-4.
7-6.
6
164
3.8-
4.5-
6.7
4.1-
5.2-
6.9
198
4.4-
5.2-
7.6
4.7-
5.6-
8
231
4.6-
5.5-
85-
8.1-
8.7
180
3.4-
4.3-
64-
5.5-
7.1
252
3.8-
4.5-
6.7
4.2-
5.8-
7.6
302
4.4-
5.2-
7.6
4.8-
6-8.
2
360
4.6-
5.5-
85.
2-6.
2-9.
2
641.
9-2.
1-3
1.7-
3.2-
5
981.
9-2.
1-3
2.6-
4-5.
0
130
1.8-
2.4-
43-
4.4-
6.1
164
2.1-
3-4.
33.
8-5.
5-7.
1
198
2.4-
3.4-
4.6
4.4-
5.9-
7.9
231
2.7-
3.7-
4.9
5-6.
3-8.
5
901.
8-2.
4-4
3-3.
9-6
112
2.1-
3-4.
33.
4-4.
1-6.
9
132
2.4-
3.4-
4.6
4-4.
9-7.
2
152
2.7-
3.7-
4.9
4.2-
5.5-
8
661.
8-2.
4-4
3-3.
9-5.
2
852.
1-3-
4.3
3.1-
4-6.
4
942.
4-3.
4-4.
64-
4.3-
6.8
112
2.7-
3.7-
4.9
4.1-
5-7.
2
1300
1000
900
800
500
400
300
200
150
100
375
x 37
530
0 x
300
225
x 22
515
0 x
150
450 x
450
525 x
525
600 x
600
5025
1.0
1.5 2.0
2.5
3.0 3.5
(6) (5)
(4) (3)
(2)
(1)
NC
8020
105
0
6050
4030
2015
NC
v k
1.5 2
2.5 3
3.5
4.3 6 8 10 14
0.50
0.25
met
/sec
.m
et/s
ec.
V t2.5 3 4
4.5 5 6 9 11 15 20
ENG
INEE
RIN
G A
ND
PERF
ORM
AN
CE
DA
TA
Easy
sel
ectio
n gr
aphs
for C
eilin
g Di
ffuse
rs -
Squ
are
Type
- M
odel
CD
and
CDC
4 W
ay, 3
Way
, 2 W
ay a
nd 1
Way
150
x 15
0; 2
25 x
225
300
x 30
037
5 x
375
450
x 45
052
5 x
525
600
x 60
0
(1)
(2)
(3)
(4)
(5)
(6)
Tota
l pre
ssur
e Dr
op
Pt(P
a)
Cor
rect
ion
fact
ors
for T
hrow
:
N =
Nom
inal
size
= L
x W
4 W
ay
2W
ay
1
Way
3 W
ay
T yT x
x 1
x 1
x 1.
10x
1.13
x 1.
20
TECNALCOCEILING DIFFUSERS
29 30
TECNALCOCEILING DIFFUSERS
1 1.5
2.0
2.5
3.0
3.5
525 x
300
450 x
300
450 x
225
450
x 15
0
300
x 22
5
300
x 15
022
5 x
150
600
400
150
100
5025
Air
volu
me
V =
Lt./
sec.
Indu
ctio
n a
nd T
empe
ratu
re c
o-ef
ficie
nt
Indu
ctio
n i
=
Tem
p. c
o-ef
ficie
nt =
t x
t x
t 0
t 0
V 0V x=
0.8
(
(
V xV 0v x
max
.
2.
5 2
1.5
1
0.
5
0.25
t XC
4.4
3.
52
2.6
4
1.76
0.88
0
.44
4 W
ay
3 W
ay
2W
ay
1
Way
T xT y
T y
T yt 0
T x
T x
x 1
x 1
x 1
x 1.
10x
1.13
x 1.
20
Cor
rect
ion
fact
ors
for T
hrow
:
V t=
0.2
5 m
et./s
ec.
225
x 15
030
0 x
150
450
x 15
0; 3
00 x
225
450
x 22
545
0 x
300;
525
x 3
00
(1)
(2)
(3)
(4)
(5)
4.0
5.0
7.0
1 1
11.58.0
7.0
6.04.0
3.0
2.5
3.2
ENG
INEE
RIN
G A
ND
PERF
ORM
AN
CE
DA
TAEa
sy s
elec
tion
grap
hs fo
r Cei
ling
Diffu
sers
- R
ecta
ngul
ar T
ype
- M
odel
CD
and
CDC
4 W
ay, 3
Way
, 2 W
ay a
nd 1
Way
(5) (4
)
(3)
(2) (1
)
6050
4030
2015
NC
Vk
CEILING DIFFUSERS FIXING DETAILS
Type ‘C’ fixing.
NOTE:Standard supply is
Ceiling Diffusers Fixing Details
Type ‘C’ fixing:
Recommended for ceiling and sill applications.
Concealed type fixing with springloaded removable core
Recommended for ceiling andsill applications.
A counter- sunk screw type fixing
Type ‘S’ fixing:
Type ‘C’ fixing:
Recommended for ceiling and sill applications.
Concealed typefixing with Snap inT-bar suspension
TECNALCOCEILING DIFFUSERS
31 32
TECNALCOCEILING DIFFUSERS
CEILING DIFFUSERS ORDERING DATA
Natural anodised aluminium
Powder coated colour finish. (Mention RAL colour number)
Mill finish aluminium
Available finishes:
Mill finish aluminium
Available finishes for the accessories :
Powder coated in black matt finish
Ordering Data:
Specify
1. TECNALCO type and model2. Nominal size - L x W3. Quantity
5. Surface finish4. Type of fixing
6. Remarks
Example:
CDS 4 way 450 x 450 mm 50 nos. Type ‘C’ fixing Powder coated finish
1. 2. 3. 4. 5. 6.
RAL 9016D DamperMill finishSponge gasketrequired
TECNALCOCEILING DIFFUSERS
33